Scott Weitzenkamp (sweitzen) wrote:
# modinfo ib_sdp filename: /lib/modules/2.6.16.21-0.8-smp/updates/kernel/drivers/infiniband /ulp/sdp/ib_sdp.ko author: Michael S. Tsirkin description: InfiniBand SDP module license: Dual BSD/GPL vermagic: 2.6.16.21-0.8-smp SMP gcc-4.1 depends: ib_core,rdma_cm srcversion: 91793E4825DEBC7A2DA9366 parm: top_mem_usage:Top system wide sdp memory usage for recv (in MB). (int) parm: rcvbuf_scale:Receive buffer size scale factor. (int) parm: send_poll_thresh:Send message size thresh hold over which to sta rt polling. (int) parm: recv_poll:How many times to poll recv. (int) parm: send_poll:How many times to poll send. (int) parm: recv_poll_miss:How many times recv poll missed. (int) parm: recv_poll_hit:How many times recv poll helped. (int) parm: send_poll_miss:How many times send poll missed. (int) parm: send_poll_hit:How many times send poll helped. (int) parm: data_debug_level:Enable data path debug tracing if > 0. (int) parm: debug_level:Enable debug tracing if > 0. (int)
I've learned a new command today :) And via other channels how to actually see the current values of those things under /sys/modules/ib_sdp/parameters.
I think I may have also figured-out why my TCP_RR tests over IPoIB have been consistently unable to hit confidence intervals for CPU utilization. I am guessing that for IPoIB that path is effectively "recv_poll=0 and/or send_poll=0" yes? When I set those values for ib_sdp and run the SDP_RR test netperf is unable to be confident that the CPU util it measures is any closer than +/- 20% of the "real" CPU utilization... (still the OFED bits in RHEL5 rather than 1.2) With the defaults, the netperf SDP_RR test hit the confidence intervals.
rick jones _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
